=>
II/ Không có đề bài.
III/
1. (-) Her mother didn't write a sick note for her.
(?) Did her mother write a sick note for her?
2. (-) Nam wasn't absent from school yesterday.
(?) Was Nam absent from school yesterday?
3. (-) I hadn't a bad cold two days ago.
(?) Did you have a bad cold two days ago?
4. (-) Many students didn't catch flu last month.
(?) Did many students catch flu last month?
5. (-) They weren't happy with their life.
(?) Were they happy with their life?
6. (-) He didn't suggest going out for dinner.
(?) Did he suggest going out for dinner?
7. (-) I wasn't busy last Sunday.
(?) Were you busy last Sunday?
8. (-) We didn't enjoy our summer vacation.
(?) Did you enjoy your summer vacation?
9. (-) Children shouldn't spend little time playing video games.
(?) Should children spend little time playing video games?
10. (-) We don't often play table tennis together.
(?) Do you often play table tennis together?